So the idea behind this is quite simple, and I have also not seen any similar solution suggested in meta(after a quick search). Succinctly, I have seen both on my answers and questions(as has anyone) that even on topics for which I consider myself an expert and follow guidelines in producing an objectively correct answer(where applicable), there still can be random downvoting with no explanation.
Clearly, reputation is a SE heuristic for expertise or competency in some area of understanding. So in my mind, a simple fix to many downvote issues would be to just force comments if user meets some lower rep bound.
Thoughts? Potential downfalls? Look forward to seeing what the rest of the users think.
Edit: Obviously different than a universal requirement.